ML18017A714: Difference between revisions
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| issue date = 10/29/1979 | | issue date = 10/29/1979 | ||
| title = Responds to IE Bulletin 79-23, Potential Failure of Emergency Diesel Generator Field Exciter Transformer. Neutral of Generator & Neutral of Primary Windings of Excitation Power Transformer Not Directly Connected | | title = Responds to IE Bulletin 79-23, Potential Failure of Emergency Diesel Generator Field Exciter Transformer. Neutral of Generator & Neutral of Primary Windings of Excitation Power Transformer Not Directly Connected | ||
| author name = | | author name = Mcduffie M | ||
| author affiliation = CAROLINA POWER & LIGHT CO. | | author affiliation = CAROLINA POWER & LIGHT CO. | ||
| addressee name = | | addressee name = Oreilly J | ||
| addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) | | addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) | ||
| docket = 05000400, 05000401, 05000402, 05000403 | | docket = 05000400, 05000401, 05000402, 05000403 | ||
Revision as of 05:12, 18 June 2019
| ML18017A714 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 10/29/1979 |
| From: | Mcduffie M CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-79-23, NUDOCS 7911210103 | |
| Download: ML18017A714 (2) | |
Text
Carolina Power Pi Liqhi Company October 29, 1979 Mr.James P.O'Reilly, Director Region II United States Nuclear Regulatory Commission 101 Marietta Street, N.W.Atlanta, Georgia 30303 SHEARON HARRIS NUCLEAR POWER PLANT UNIT NOS.1, 2, 3 AND 4 DOCKET NOS.50-400, 50-401, 50-402, AND 50<03 IE BULLETIN 79-23
Dear Mr.O'Reilly:
Carolina Power 6 Light Company (CPSL)has investigated the potential of high cir'culating currents to exist in the emergency diesel generators planned fog use at the Shearon Harris Nuclear Power Plant (SHNPP).Our investigation has determined that the neutral of the generator and the neutral of the primary windings of the excitation power transformer are not directly connected.
Purthermore, the neutral point of the excitation power transformer is not grounded.Therefore, circulating curre'nts as described in Bulletin 79-23 will not be developed in the SHNPP emergency diesel generators.
The full load testing required by Item 2 of the bulletin cannot be perforraed as the diesel generators have not yet been delivered to the construction site.SHNPP's emergency diesel generators will be fully tested as part of our pre-operational testing program.CPSL intends no further response to this bulletin.Yours very truly, M.A.McDuffie Senior Vice President Engineering 6 Construction MAM/j cb cc: United States Nuclear Regulatory Commission Office of Inspection and Envorcement Division of Reactor Operations Inspection Washington, D.C.20555~9112%0/0 3 C 1~\'I l.